Add accounts, members, and processor-agnostic payment linking

- account table (billing entity, soft-delete, company-scoped)
- member table (people on an account, is_minor from DOB)
- account_processor_link table (maps accounts to any payment
  processor — stripe, global_payments — instead of stripe_customer_id
  directly on account)
- Full CRUD routes + search (name, email, phone, account_number)
- Member routes nested under accounts with isMinor auto-calculation
- Zod validation schemas in @forte/shared
- 19 tests passing

packages/backend/src/db/schema/accounts.ts

@@ -0,0 +1,83 @@
+import {
+  pgTable,
+  uuid,
+  varchar,
+  text,
+  jsonb,
+  timestamp,
+  boolean,
+  date,
+  pgEnum,
+} from 'drizzle-orm/pg-core'
+import { companies } from './stores.js'
+
+export const billingModeEnum = pgEnum('billing_mode', ['consolidated', 'split'])
+
+export const accounts = pgTable('account', {
+  id: uuid('id').primaryKey().defaultRandom(),
+  companyId: uuid('company_id')
+    .notNull()
+    .references(() => companies.id),
+  accountNumber: varchar('account_number', { length: 50 }),
+  name: varchar('name', { length: 255 }).notNull(),
+  email: varchar('email', { length: 255 }),
+  phone: varchar('phone', { length: 50 }),
+  address: jsonb('address').$type<{
+    street?: string
+    city?: string
+    state?: string
+    zip?: string
+  }>(),
+  billingMode: billingModeEnum('billing_mode').notNull().default('consolidated'),
+  notes: text('notes'),
+  isActive: boolean('is_active').notNull().default(true),
+  legacyId: varchar('legacy_id', { length: 255 }),
+  legacySource: varchar('legacy_source', { length: 50 }),
+  migratedAt: timestamp('migrated_at', { withTimezone: true }),
+  createdAt: timestamp('created_at', { withTimezone: true }).notNull().defaultNow(),
+  updatedAt: timestamp('updated_at', { withTimezone: true }).notNull().defaultNow(),
+})
+
+export const members = pgTable('member', {
+  id: uuid('id').primaryKey().defaultRandom(),
+  accountId: uuid('account_id')
+    .notNull()
+    .references(() => accounts.id),
+  companyId: uuid('company_id')
+    .notNull()
+    .references(() => companies.id),
+  firstName: varchar('first_name', { length: 100 }).notNull(),
+  lastName: varchar('last_name', { length: 100 }).notNull(),
+  dateOfBirth: date('date_of_birth'),
+  isMinor: boolean('is_minor').notNull().default(false),
+  email: varchar('email', { length: 255 }),
+  phone: varchar('phone', { length: 50 }),
+  notes: text('notes'),
+  legacyId: varchar('legacy_id', { length: 255 }),
+  createdAt: timestamp('created_at', { withTimezone: true }).notNull().defaultNow(),
+  updatedAt: timestamp('updated_at', { withTimezone: true }).notNull().defaultNow(),
+})
+
+export const processorEnum = pgEnum('payment_processor', ['stripe', 'global_payments'])
+
+export const accountProcessorLinks = pgTable('account_processor_link', {
+  id: uuid('id').primaryKey().defaultRandom(),
+  accountId: uuid('account_id')
+    .notNull()
+    .references(() => accounts.id),
+  companyId: uuid('company_id')
+    .notNull()
+    .references(() => companies.id),
+  processor: processorEnum('processor').notNull(),
+  processorCustomerId: varchar('processor_customer_id', { length: 255 }).notNull(),
+  isActive: boolean('is_active').notNull().default(true),
+  createdAt: timestamp('created_at', { withTimezone: true }).notNull().defaultNow(),
+})
+
+export type AccountProcessorLink = typeof accountProcessorLinks.$inferSelect
+export type AccountProcessorLinkInsert = typeof accountProcessorLinks.$inferInsert
+
+export type Account = typeof accounts.$inferSelect
+export type AccountInsert = typeof accounts.$inferInsert
+export type Member = typeof members.$inferSelect
+export type MemberInsert = typeof members.$inferInsert